It's true. A normal acetaminophen or Tylenol dose, described on the printed directions, is much closer to a liver-damaging dose than for other common over the counter pain relievers. If you follow the printed directions you should be safe. If you exceed the printed directions you can quickly have liver damage and liver failure. Exceeding the safe dose may mean taking more pills/capsules that stated, or continuing to use for longer than the recommended time. With acetaminophen or Tylenol you need to follow the directions for amount and times exactly, not one bit more. I was a long-time user of Tylenol for decades. I switched back to aspirin. Aspirin, if you take it with food and drink has very low risk and minor complications. Aspirin has been in common use over 100 years. It's harm is well understood and seldom more than a minor issue. Tylenol overdose or liver damaging dose is much closer to the exact printed recommended dose than aspirin or advil which may not be dangerous at 5 or more times the recommended dose.